HD 150136
Template:Location mark Location of HD 150136 (circled) | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ara[1] |
| Right ascension | Template:RA[2] |
| Declination | Template:DEC[2] |
| Apparent magnitude (V) | 5.54[3] |
| Characteristics | |
| Spectral type | O3 V((f*)) - O3.5 V((f+)) + O5.5-6 V((f)) + O6.5-7 V((f))[4] |
| U−B Template:Engvar | −0.76[3] |
| B−V Template:Engvar | +0.20[3] |
| Astrometry | |
| Radial velocity (Rv) | −27[5] km/s |
| Proper motion (μ) | RA: +2.514[2] mas/yr Dec.: −4.309[2] mas/yr |
| Parallax (π) | 0.6934±0.0484 mas[2] |
| Distance | Script error: No such module "convert".[6] ly |
| Absolute magnitude (MV) | −6.47 (−5.91 + −4.90 + −4.44)[4] |
| Orbit[6] | |
| Primary | Primary |
| Companion | Secondary |
| Period (P) | 2.67454 days |
| Semi-major axis (a) | Template:Solar radius[4] |
| Eccentricity (e) | 0 |
| Inclination (i) | 53[7]° |
| Semi-amplitude (K1) (primary) | 208.3 km/s |
| Semi-amplitude (K2) (secondary) | 334.5 km/s |
| Orbit[7] | |
| Primary | Primary/Secondary |
| Companion | Tertiary |
| Period (P) | Script error: No such module "val". |
| Semi-major axis (a) | 16.918" (Script error: No such module "val".[6]) |
| Eccentricity (e) | 0.6780 |
| Inclination (i) | 106.11° |
| Semi-amplitude (K1) (primary) | 22.1 km/s |
| Semi-amplitude (K2) (secondary) | 70.6 km/s |
| Details[4] | |
| Primary | |
| Mass | 54[7] Template:Solar mass |
| Radius | 12.13 Template:Solar radius |
| Luminosity | 724,000 Template:Solar luminosity |
| Surface gravity (log g) | 4.00 cgs |
| Temperature | 46,500 K |
| Rotational velocity (v sin i) | 171 km/s |
| Secondary | |
| Mass | 34[7] Template:Solar mass |
| Radius | 9.54 Template:Solar radius |
| Luminosity | 209,000 Template:Solar luminosity |
| Surface gravity (log g) | 4.00 cgs |
| Temperature | 40,000 K |
| Metallicity [Fe/H] | dex |
| Rotational velocity (v sin i) | 136 km/s |
| Age | 0-2 Myr |
| Tertiary | |
| Mass | 27.1[7] Template:Solar mass |
| Radius | 8.24 Template:Solar radius |
| Luminosity | 102,000 Template:Solar luminosity |
| Surface gravity (log g) | 3.50 cgs |
| Temperature | 36,000 K |
| Rotational velocity (v sin i) | 72 km/s |
| Age | 1-3 Myr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| HD 150136, CD−48°11070, HIP 81702, HR 6187, SAO 227049, WDS J16413-4846 | |
| Database references | |
| SIMBAD | data |
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HD 150136 is a multiple star system in the southern constellation of Ara, around 4,300 light years away. It is the brightest member of the faint open cluster NGC 6193, part of the Ara OB1 association.
System
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HD 150136 is listed in the Washington Double Star Catalog as having seven visual components within Script error: No such module "val".. Component A is a close triple system containing three massive class O main sequence stars. The brightest companion is catalogued individually as HD 150135 as well as component C of the multiple system, separated by only 10 arcseconds. It is another O class spectroscopic binary and also a member of NGC 6193. The other catalogued components are all 10th to 12th magnitude, similar to many other stars known to be members of NGC 6193.[8]
The primary star consists of a double-lined spectroscopic binary[5] with a more distant tertiary companion. The third star is orbiting the other two with a period of 8.2 years, an eccentricity of 0.73, and an inclination of 108°. The close binary stars are separated by hardly more than their own diameters and orbit in less than 3 days, but the third is separated enough to have been resolved visually by VLTI. The measured separation in 2012 was 9 milli-arcseconds, corresponding to 11-12 AU.[6]
Properties
All three (four, including HD 150135) of the brightest stars are massive luminous O class main sequence stars, 27 to 54 times as massive as the Sun. They are around 10 times the size of the Sun, but 6-8 times hotter and each is over 100,000 times as luminous. The primary star is the closest O3 star to Earth, Script error: No such module "val"., visually 18,000 times as bright as the sun, but because of its high temperature it is around three quarters of a million times more luminous including all wavelengths.[4]
See also
References
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- ↑ Template:Cite constellation
- ↑ a b c d e Template:Cite Gaia DR3
- ↑ a b c Script error: No such module "Citation/CS1".
- ↑ a b c d e Script error: No such module "Citation/CS1".
- ↑ a b Script error: No such module "Citation/CS1".
- ↑ a b c d Script error: No such module "Citation/CS1".
- ↑ a b c d e Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
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External links
- Script error: No such module "Citation/CS1".
- HR 6187
- Image HD 150136
- CCDM J16413-4846
- NGC 6193